"I hate it!" she said. "There's cellulite on it and no matter what I do, I can't get rid of it. The reality is that it's connective tissue. I can starve and my boobs will go and my face will get gaunt, but I will still have cellulite."

Michaels, who appears to be in top shape and is also touted as a health and fitness expert, lists her abs as her favorite aspect of her body and keeps fit by exercising at a gym three to four times a week. She said she feels "aggravated" if she does not get to exercise but does not "bug out" about her body.

"I just kill it, whether it's doing kettle bells, mixed martial arts, Spinning classes, or power yoga," she said. "I get bored easily, so I need something that's going to keep me focused. I mix it up. Everything I do is a combo of body resistance and cardiovascular endurance.

"As much as I hate it, I run every time, like three miles," she added. "It makes you skinny, that's why. It works."

She also told Fitness that she is not as disciplined with her finances as she is with her health and workouts, adding: "I got involved with some bad investments, and now I'm learning to take responsibility for my money. You have to be present and responsible in everything."

Michaels recently left "The Biggest Loser" after appearing on most of its episodes since 2004. Starting in September, she will serve as a co-host on the syndicated daytime talk show "The Doctors" and will also serve as a special correspondent on Dr. Phil McGraw's syndicated therapy series "Dr. Phil."